The Susquehanna, Gettysburg and Potomac Railway (SG&P) was a railroad that operated in Pennsylvania in the 1870s.

The 17 mile (27 km) main line ran from Gettysburg to Hanover.

[1] The SG&P was formed in 1870 to purchase the assets of the Gettysburg Railroad.

Operations were handled by the Hanover Branch RR.

The new company extended the line west to Marsh Creek in 1884 and to Orrtanna in 1885.